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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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12-30-2020, 03:53 PM | #29 |
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I'm thinking of using swizzle sticks for my power steering cooler.....
I cannot see a downside Wait......what........
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http://www.ft86club.com/forums/showthread.php?t=133311 I'm only here for the biscuits |
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12-30-2020, 04:58 PM | #30 |
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To be fair, he does specify for track use and especially FI. I did laugh when he said you have to have an oil cooler, then spent several minutes complaining about how it's hard to get the oil up to temp.
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12-30-2020, 05:00 PM | #31 | |
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I believe in the case of track + FI, an oil cooler is for sure needed. |
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12-30-2020, 05:04 PM | #32 | |
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I monitor it with my P3 gauge via OBD2 so as mentioned it is actually like 220 (maybe). |
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12-31-2020, 02:55 AM | #33 |
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In light of the info from this thread, I think a Jackson Racing Rad/Oil Cooler is in my future.
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12-31-2020, 08:53 AM | #34 | |
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Might as well post up data from the link: What this is telling us: an oil cooler does bring oil temps down at the track, in this case by about 25F-30F. But is 275F *really* a problem for good synthetic oil? I don't think it is. But what about oil pressure? Plot shows the same pressure for the same 5w30 oil whether it's at 275F without an oil cooler (yellow), or at 250F *with* an oil cooler (green). This is only one set of data, but the conclusion could be drawn that pressure drop due to the cooler nearly exactly offsets the pressure that should have been gained due to cooler oil. Last edited by ZDan; 12-31-2020 at 09:21 AM. |
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12-31-2020, 09:19 AM | #35 | |
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He tells us: "We've already established that, if you track this car, stock or with forced induction, you need an oil cooler on the car, there's no way around it." No, we have not established that... Him having "talked to people who race" doesn't establish the *need* for an oil cooler. He refers to the service manual which gives specs for oil pressure, but what he doesn't mention is that those specs are not an absolute requirement, but are referenced to *a specified temperature* which is close to normal operating temp. Of *course* pressure will drop with elevated temperature and it's higher at lower temps (which he mentions). The spec just means that at the *specified* temperature, pressure significantly lower than spec indicates there's a problem. It does not mean it's a "problem" if pressure is lower than that at higher temps. He does mention "you wanna stay out of the 40psi range", so maybe he does understand that pressures below the "spec" are somewhat to be expected. But anyway, he's speaking as if he has authority on the subject that I don't think he actually does... Last edited by ZDan; 12-31-2020 at 09:35 AM. |
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12-31-2020, 10:07 AM | #36 |
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Everything I've read says that synthetic oil is fine at even 300°F. Why is there such a push to put oil coolers on these cars? You want the oil hot (>212°F) so it burns off the water from combustion byproducts. Unless you're changing it really often. Why not just skip the pressure lose of a cooler and run an appropriate oil for the temperatures. M1 0W-40 to get the best viscosity index I know of would be my thought process as it should maintain its viscosity well as temperatures increase and still act like 0W-20 at startup. If your oil temps are going higher than 300°F or if you're pressure is going too low - and the oil cooler will actually increase post cooler pressure - then get one. Otherwise, why add the complication?
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12-31-2020, 10:47 AM | #37 | |
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12-31-2020, 11:11 AM | #38 |
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And 30 weight oil at 275F will have about the same viscosity as 20 weight at 235F. My oil temps stabilize at a tick over 270F indicated at the track (no matter what ambient temp), so I run 30 weight, might consider 40wt next year...
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12-31-2020, 11:28 AM | #39 |
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I will try to do some sort testing next season, I have another timing cover I could drill and tap for running sending units on the inlet and outlet side. It is still sitting in my aluminum scrap pile. As I have mentioned quite a bit before, I seem to get a lot of cavitation on 5-30 at high RPMs. My peak pressures from 6k to redline were really not that much different then 0-20 because of it and the pressure was more stable with 0-20. Granted, I have only measured this with an oil cooler on the car.
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12-31-2020, 01:19 PM | #40 | ||
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I'm sure you're familiar with this thread: https://www.ft86club.com/forums/showthread.php?t=134863 Do you have KillerB pickup tube? |
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12-31-2020, 01:21 PM | #41 | |
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12-31-2020, 04:12 PM | #42 |
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Not usable in what sense? I read through the same thread Dan posted and was additionally planning on getting a baffled pan along with the killerb pickup.
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